html,body{
    background: url(../images/bg.png);
    margin: 0;
    padding: 0;
    background-attachment: fixed;
    -webkit-background-attachment: fixed;
}
.time-line{
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    SimSun, sans-serif;
    list-style: none;
    margin: 0;
    position: relative;
    perspective: 800px;
    padding: 1rem;
    .line{
        position: absolute;
        background: #d7d8d8;
        left: 130px;
        width: 2px;
        top: 0;
        bottom: 0;
        z-index: 0;
    }
    li:not(.line){
        display: flex;
        position: relative;
        justify-content: center;
        align-items: flex-start;
        margin-bottom: 30px;
        visibility: hidden;
        &::after{
            content: '';
            position: absolute;
            left: 99px;
            background: #fff;
            border: solid 2px #5fe213;
            width: 20px;
            height: 20px;
            top: 0;
            border-radius: 50%;
            z-index: 10;
        }

        .left{
            width: 90px;
            text-align: right;
            margin: 0;
            transform: scaleY(.9);
            .year{
                font-size: .6rem;
                color: #666;
            }
            .date{
                font-size: 1rem;
                color: #888;
                display: inline-block;
            }
        }
        .right{
            flex: 1;
            margin-left: 50px;
            .title{
                margin: 0;
                padding-bottom: .5rem;
                font-size: .8rem;
                border-bottom: dashed 1px #ccc;
            }
            .desc{
                font-size: .6rem;
                color: #666;
                margin: .5rem 0;
            }
            .pic{
                border: solid 1px #dedede;
                position: relative;
                border-radius: 5px;
                overflow: hidden;
                box-shadow: 6px 6px 40px -10px rgba(0,0,0,.5);
                &::after{
                    content: '';
                    position: absolute;
                    left: 0;
                    right: 0;
                    top: 0;
                    bottom: 0;
                    border: solid 5px #fff;
                    border-radius: 5px;
                }
                img{
                    width: 100%;
                }
            }

        }
    }
}